Methods The segments from distal ileum were studied in 16 female Wister rats with 10 rats in ?in vivo? group and 6 rats in ?in vitro? group.

• 方法 将 1 6只Wister大鼠分为两组 ,在体组 1 0只 ,离体组 6只 ,对末端回肠做充压实验。